batgrbproduct Analysis for Trigger=607399
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Jul 29 16:12:46 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger607399/batgroup_hand_proc
======================================================================
Trigger: 00607399 Segment: 000
BAT Trigger Time: 428294496.212 [s; MET]
Trigger Stop: 428294496.276 [s; MET]
UTC: 2014-07-29T02:41:23.886820 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 272.172118721435 Dec: -20.4373566980691 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 19.08
Image Trigger?: NO
Rate S/N Ratio: 85.48684109265 [ if not an image trigger ]
Image S/N Ratio: 19.08
Flight Position: [ source = BAT ]
RA: 272.172118721435 Dec: -20.4373566980691 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 272.167715156312 Dec: -20.4321746966956 [deg; J2000]
{ 18h 08m 40.3s , -20d 25' 55.8" }
+/- 0.997674432129378 [arcmin] (estimated 90% radius based on SNR)
+/- 0.403990507504367 [arcmin] (formal 1-sigma fit error)
SNR: 30.5184793895158
Angular difference between Flight and Ground position is 0.397455 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 0.159999966621399 +/- 0.039999997615816
Measured from: -0.0480000376701355
to: 0.111999928951263 [s; relative to TRIGTIME]
T50: 0.0519999265670776 +/- 0.0126491362748289
Measured from: 0.00800001621246338
to: 0.059999942779541 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.462000012397766
to: 0.537999987602234 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0799999833106995
to: 0.15200001001358 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.099719 0.085936 0.027563 0.001984
0.004770 0.004336 0.002850 0.001671 [error]
Peak 0.103430 0.091835 0.028202 0.002600
0.006894 0.006346 0.004723 0.003634 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 3.34e-08 3.23e-08 2.18e-08 2.30e-08 9.68e-08 1.10e-07 erg/cm2
Error 2.79e-09 2.04e-09 2.36e-09 4.64e-09 6.29e-09 8.40e-09 erg/cm2
Peak flux Power-law 1.07e+00 6.35e-01 2.39e-01 1.20e-01 2.01e+00 2.07e+00 ph/cm2/s
Error 1.20e-01 5.39e-02 3.69e-02 3.38e-02 1.68e-01 1.71e-01 ph/cm2/s
Fluence Cutoff-PL 2.93e-08 3.74e-08 2.14e-08 4.97e-09 9.21e-08 9.30e-08 erg/cm2
Error 3.27e-09 2.88e-09 3.08e-09 3.39e-09 6.65e-09 7.42e-09 erg/cm2
Peak flux Cutoff-PL 9.41e-01 7.40e-01 2.17e-01 2.05e-02 1.92e+00 1.92e+00 ph/cm2/s
Error 1.40e-01 7.55e-02 4.61e-02 2.46e-02 1.73e-01 1.75e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- 1.92e+00 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.568 0.113 - - 4.09e-02 3.32e-03 62.590 57
CPL 1.271 0.593 23.9 10.2 2.24e-01 0.00e+00 42.450 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.408 0.162 - - 1.08e-02 1.27e-03 59.870 57
CPL 0.878 0.864 28.6 8.9 8.87e-02 1.62e-01 47.280 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.232 -0.080 0.152
T90 0.160 -0.048 0.112
T50 0.052 0.008 0.060
Peak 1.000 -0.462 0.538
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
272.1677 -20.4322 0.0063 18.1570 163.2795 0.2250406 30.518 TRIG_00607399
Foreground time interval of the image:
-0.080 0.152 (delta_t = 0.232 [sec])
Background time interval of the image:
-119.212 -0.080 (delta_t = 119.132 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.080 sec. to 0.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.56850 ( -0.109785 0.115295 )
Norm@50keV : 4.09092E-02 ( -0.00334773 0.00330047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.846886e-01
Photon flux (15-150 keV) in 0.232 sec: 8.38582 ( -0.543405 0.544705 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.6763e-08 ( -6.28126e-09 6.29674e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.080 sec. to 0.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27127 ( -0.637231 0.548026 )
Epeak [keV] : 23.8558 ( -13.765 6.60591 )
Norm@50keV : 0.224086 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.45 using 59 PHA bins.
# Reduced chi-squared = 0.7580 for 56 degrees of freedom
# Null hypothesis probability = 9.094002e-01
Photon flux (15-150 keV) in 0.232 sec: 8.00955 ( -0.56467 0.56586 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.20516e-08 ( -6.61594e-09 6.67998e-09 ) ergs/cm2
Band function
Time interval is from -0.080 sec. to 0.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.24715 ( -0.340011 0.702226 )
beta : -4.16077 ( 4.203 1.079 )
Epeak [keV] : 24.0966 ( -11.6501 6.36662 )
Norm@50keV : 0.231806 ( -0.0707401 0.387506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.20 using 59 PHA bins.
# Reduced chi-squared = 0.7673 for 55 degrees of freedom
# Null hypothesis probability = 8.971339e-01
Photon flux (15-150 keV) in 0.232 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.71392 (-0.572566 0.597703)
R^2/D10^2 : 6.26385 (-1.52499 2.06003)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.58 using 59 PHA bins.
# Reduced chi-squared = 1.379 for 57 degrees of freedom
# Null hypothesis probability = 3.063727e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.111e-08 2.231e-09
25- 50 4.262e-08 2.935e-09
50-150 1.472e-08 2.648e-09
15-150 7.845e-08 5.382e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 36.2002 (-4.37985 5.07017)
Norm : 57.5036 (-6.77268 7.7996)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.53 using 59 PHA bins.
# Reduced chi-squared = 0.7461 for 57 degrees of freedom
# Null hypothesis probability = 9.232186e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.954e-08 2.540e-09
25- 50 3.715e-08 2.424e-09
50-150 2.568e-08 4.366e-09
15-150 9.238e-08 6.334e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.20931 (-0.98582 1.19048)
R1^2/D10^2 : 78.0847 (-49.2072 193.793)
kT2 [keV] : 11.9104 (-1.51175 2.28779)
R2^2/D10^2 : 1.28576 (-0.772585 1.24461)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.27 using 59 PHA bins.
# Reduced chi-squared = 0.7685 for 55 degrees of freedom
# Null hypothesis probability = 8.958016e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.993e-08 1.290e-08
25- 50 3.664e-08 1.077e-08
50-150 2.382e-08 6.799e-09
15-150 9.039e-08 2.192e-08
Peak spectrum fit
Power-law model
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40774 ( -0.157833 0.166898 )
Norm@50keV : 1.08099E-02 ( -0.00127845 0.0012622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.87 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 57 degrees of freedom
# Null hypothesis probability = 3.720743e-01
Photon flux (15-150 keV) in 1 sec: 2.00921 ( -0.168243 0.168359 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.05634e-07 ( -9.94763e-09 1.00869e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.878352 ( -0.936878 0.790471 )
Epeak [keV] : 28.6142 ( -11.9945 5.77805 )
Norm@50keV : 8.86811E-02 ( -0.0886765 0.236134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.28 using 59 PHA bins.
# Reduced chi-squared = 0.8443 for 56 degrees of freedom
# Null hypothesis probability = 7.902779e-01
Photon flux (15-150 keV) in 1 sec: 1.91632 ( -0.17309 0.17344 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.59144e-08 ( -9.687e-09 1.02846e-08 ) ergs/cm2
Band function
Time interval is from -0.462 sec. to 0.538 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.878914 ( -0.62104 1.16017 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 28.6058 ( -11.9811 5.77856 )
Norm@50keV : 8.86070E-02 ( -0.0886068 0.236529 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.28 using 59 PHA bins.
# Reduced chi-squared = 0.8596 for 55 degrees of freedom
# Null hypothesis probability = 7.609564e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.69690 (-0.742898 0.789415)
R^2/D10^2 : 1.57229 (-0.471459 0.691094)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.09 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 57 degrees of freedom
# Null hypothesis probability = 2.996941e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.272e-08 3.090e-09
25- 50 4.574e-08 4.520e-09
50-150 1.569e-08 3.820e-09
15-150 8.416e-08 8.465e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 38.0691 (-6.45564 8.25332)
Norm : 13.4821 (-2.0238 2.42639)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.18 using 59 PHA bins.
# Reduced chi-squared = 0.8453 for 57 degrees of freedom
# Null hypothesis probability = 7.908970e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.043e-08 3.170e-09
25- 50 3.917e-08 3.595e-09
50-150 2.868e-08 7.165e-09
15-150 9.827e-08 9.415e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.75615 (-1.28059 1.60092)
R1^2/D10^2 : 26.5221 (-20.2691 208.971)
kT2 [keV] : 11.0554 (-1.56586 2.47252)
R2^2/D10^2 : 0.479556 (-0.308648 0.512488)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.29 using 59 PHA bins.
# Reduced chi-squared = 0.8234 for 55 degrees of freedom
# Null hypothesis probability = 8.217933e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.990e-08 1.438e-08
25- 50 4.019e-08 1.870e-08
50-150 2.422e-08 1.003e-08
15-150 9.431e-08 3.610e-08
Plot creation:
Tue Jul 29 16:23:50 EDT 2014